MEASUREMENT AND ASSESSMENT OF RADON GAS CONCENTRATION IN IFIN-HH AND ELI-NP USING THE ACTIVE METHOD

The study shows the methodology for measuring and assessing the radon concentration in indoor and outdoor environments. The results analyzed in the paper show the radioactive measurements of the natural radiation background from the IFIN-HH and ELI-NP, Romania, for radiometrical purposes, for public health and radiological security. The indoor radon concentration varies from 42 to 154 Bq/m(3) with an average value of 109.4 Bq/m(3), and the outdoor concentration varies from 15 to 28 Bq/m(3) with the average value of 23.1 Bq/m(3). Also, we developed a research study in order to investigate the long-term behavior of the diurnal and seasonal fluctuations of radon Rn-222 and the influence of environmental conditions and other climatic factors. In correlation with the radon concentration measured, the effective dose was also calculated.